Questions tagged [knife-tool]

The Knife Tool cuts new edges into meshes, adding vertices to user-defined points regardless of existing topology. The Knife Project Tool projects the topology of one object onto another, using the current view angle. Use this tag for questions pertaining to the Knife Tool and the Knife Project Tool.

Filter by
Sorted by
Tagged with
1 vote
1 answer
17 views

Problem cutting object - results in polygon

[Translated]: I can't cut the object normally, instead I have a polygon. How can I fix this so that it no longer exists?
0 votes
1 answer
17 views

Easiest way to cut out outline from mesh

How do I cut an outline/silhouette out of a mesh? I.e. remove all interior vertices inside the outlining shape create new vertices/edges around border of outlining shape Example: Here is Lake ...
0 votes
0 answers
14 views

How can I cut this mesh into the object while it retains it's shape?

I've been modeling this Daihatsu Midget for a while now and I got to this part but I don't know how to "cut through and paste" these objects into the rear panel. What I have: What I would ...
0 votes
0 answers
21 views

Is there an easier way to cut out holes in this object to match the image I'm referencing?

I am trying to cut wholes in my object, but I've noticed it's very time consuming and I would like to get the computer to do it so that it's easier, faster, and more accurate... The screenshots below ...
0 votes
0 answers
16 views

Shade issue when making the windows after knife project

I have a shade issue when making the windows of a private jet after used knife project. I used data transfer, weightend normal but it didn't work.
0 votes
1 answer
591 views

How can you cut shapes out of an object with other objects?

I know this has been asked before but I seem to be struggling to use either the knife project tool or merging meshes and then separating out sections to cut pieces in a mesh. This is probably due to ...
2 votes
1 answer
144 views

Removing intersecting and internal geometry

I was trying to follow this tutorial made in Blender 2.71.x but I haven't figured out how it can be done in 2.93.x yet. He pulls out the self intersecting geometry but when I try and do it, it says ...
0 votes
1 answer
21 views

Using float numbers in knife's angle constraint

how do I use float numbers (0.5, 22.5, etc) in the angle constraint when using the knife tool? Whenever I try typing 22 and then the .5, it just resets and goes to 5 instead. I'm using Blender 3.2.0 ...
10 votes
2 answers
6k views

Is there any way to get a specific angle using the knife tool?

Instead of the constrained 45 degrees that happens when you press C, is there a specific angle I can get for example 35 degrees instead? It's currently cut at 45 degrees in the attached image and I ...
1 vote
1 answer
814 views

Non-manifold, bad contig Edges and Sharp Edges on simple basic geometry

I have had issues trying to produce clean geometry for 3D printing for what is simple geometry. I check wether my mesh is clean or not using the 3D printing addon. Here is a step by step simple ...
0 votes
1 answer
54 views

How to remove this protruding mass inside a self-intersecting object?

Inside view of the object with the protruding edge that I want to remove. Outside view of the object. The tubular portion intersects the body and results in the protruding mass that I want to remove. ...
2 votes
0 answers
185 views

Why is the Knife Tool so Finicky? [closed]

So many times I try to use the knife tool and it simply won't grab anything. I move the screen around randomly and zoom in and out and if I'm lucky it will eventually start working. See gif for ...
0 votes
1 answer
301 views

3D Connexion Space Mouse stops responding during Blender operations

As the question title suggests, I have a minor problem with Blender's implementation of Space mouse/3D mouse control. I finally got the actual operation of the 3D mouse to be like I want. Except ...
0 votes
0 answers
34 views

Help! Im getting these weird streaks/cracks when I knife project

The longs streaks is what happens when I knife project, is there a solution or another method. I am trying to put doors on a plane fuselage
1 vote
1 answer
83 views

Cut a mesh with knife tool and separate

I am pretty new to blender, trying to cut a mesh in different pieces. I know I can cut a mesh and then separate the mesh using the bisect tool, but I don't want to cut the plane, I want to separate ...
0 votes
0 answers
10 views

How can I get a clean intersection for inner wall corner? [duplicate]

I'm creating a modular kit for a game level. I started out by making a regular wall, and I'm now trying to use it as the basis to create the corners. The wall has a pivot located at one of the bottom ...
0 votes
1 answer
1k views

Blender exported mesh extremely deformed

After exporting my mesh to FBX form to test out my sails in physx clothing, I noticed my mesh was terribly deformed. There were a lot of random spikes and abnormalities that appeared in the main hull ...
1 vote
1 answer
808 views

Knife tool with bmesh API

I need to find the intersection curve between two (open) meshes, and I can do that interactively with the knife tool. In search for a way to do it from a script, I came across the following highly ...
0 votes
2 answers
191 views

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons
0 votes
0 answers
99 views

Blender 3.4 knife tool not working

The knife tool is not snapping to verticies when cutting, and also when I make cuts it will only make some cuts (see example). I dont have any duplicate faces or vertices, does anyone know whats ...
1 vote
2 answers
85 views

How to subdivide this n-gon shape to avoid artifacts?

I have this object which I filled with flat N-gon faces such as this highlighted face. And then I raised it using Propertional Editing. As expected it would ...
0 votes
0 answers
19 views

Knife tool wont fully cut through,

I'm new to Blender. I've been working on a cloth simulation project and when I get to the step where I need to use the knife tool to simulate tearing cloth, the tool doesn't fully work. It seems as if ...
0 votes
1 answer
63 views

Cutting in a plane using an image as a mask

I would like to create independent tortoiseshells meshes from a boolean mask. The boolean mask would be used to cut in the plane automatically. The method I am using at the moment is to use the cut ...
0 votes
0 answers
17 views

I have a problem with the knife function

I'm going to execute the knife command by hand drawing (to make a curve), but the cut is directed towards the cursor. Anyone know how to disable this snap? Thanks.
1 vote
0 answers
27 views

Can someone please explain to me why the knife tool is not working on some of the faces [closed]

I have been stuck here for a while and I couldn't figure out why the knife tool is not working on some parts of the mesh. This will clear a lot of confusion for me so please help me out here. Here is ...
0 votes
0 answers
25 views

Is there easier way to fill this hole automatically?

Hello, I want to fill this hole like this : Not like this : I usually use "F" to fill hole and Knife tool to make it be along with edge lines manually, But if there is easier way to fill ...
2 votes
1 answer
301 views

some vertices won't snap when using knife tool

I try to cut through my face by just selecting vertices with knife tool, but it snaps only on one vertex so obviously i am doing some beginner mistake here. What do i have to do that it snaps to all ...
0 votes
0 answers
100 views

Blender 3.3.0 Cut mesh with another mesh using knife project doesnt work! Help!

I just started to learn blender two days ago, so i might be wrong in may ways to use blender. So I have a geographical 3d mesh which shows a highway beyond a car tunnel. What I wanna do is cut this ...
0 votes
1 answer
199 views

Cut straight line with knife tool

Im trying to create a face in order to extrude upwards to create a wall for my church building. In order to do that I figured I make a cut with the knife tool like so: Ideally that line would be ...
1 vote
1 answer
46 views

Boolean Tool is not cutting properly

I am currently trying to make a 5 gang box faceplate for 5 drok meters to measure power. I was able to use the boolean tool to cut out the screw holes and one of the meter inserts. However, when I use ...
56 votes
2 answers
96k views

Cut straight lines with knife tool

How can I get the knife tool to snap to the same spot on another edge to get a straight cut. Here is an example of what I want to do: When the line turns green the cut is straight. How can I do this ...
1 vote
2 answers
33 views

Knife tool, Subdivide faces, edge select do not work in blender at all to make a rudimentary split face

I dont understand why something that should be so simple in any 3d modeling software doesn't work in Blender All I want to do is splice these faces to add a door to my floor plan I tried using the ...
1 vote
0 answers
23 views

Sometimes I am unable to make the most simple cuts with knife

I am unable to cut a face with 4 vertices and a simple and "one-way going" topology. I had issues with it before, so I had to cut something a couple of times before it worked. After I cut ...
1 vote
1 answer
43 views

Strips cut on video mode

I don't know if you already tried to edit a serie of videos on blender. It's very hard because of the mosto common tool isnt there. WHAT WE DO: I'm pointing player cursor on a place in strip, cutting ...
1 vote
0 answers
29 views

Dissecting equal sized parts of cylinder

I am trying to create a cylinder that is dissected into 10 equal sections (filled layers!) to be printed later on. Essentially like in the picture but without those gaps in between, so far I have not ...
1 vote
1 answer
914 views

Messed up Topology (Shading?) due to the usage of the Knife Project Tool

Dear Blender Stack Exchange Community, After trying to model a sword (after a concept art) I did run into some issues after using the Knife Project Tool. I am trying to add some Screws using the ...
1 vote
1 answer
104 views

Knife tool bugging out in certain areas

I'm using the knife tool to cut out landmass shapes on a simple plane object. Most of the time it works fine, but on certain areas, I get this weird ghosting effect with the cursor rapidly shifting ...
3 votes
1 answer
270 views

How can I dig a hold between two object?

I have two models. Is there a way to make an Edge in one model by using another model's shape?
1 vote
1 answer
82 views

Is there a way, maybe by an add-on, to subdivide mesh faces, in edit mode, at a fixed step?

I wish to subdivide (vertically and/or horizontally) aligned faces but with different dimensions (i.e. I can have 2 or more vertically aligned faces with the same width but each with a different ...
1 vote
0 answers
107 views

How to disable snapping for knife project?

I am trying to cut two different meshes A and B with the same polyline P so that I can join A and B afterwards with no holes or anomalies. I am using the knife project tool and this works quite well. ...
3 votes
1 answer
168 views

Is there any difference between selecting knife tool in the tool menu and pressing hotkey "K"?

So I have been trying to use the knife tool, and I want to start my cut on an exsisting vertex. I noticed that if I click knife tool in the tool menu, I get a knife cursor, and I cannot start cutting ...
1 vote
2 answers
8k views

knife tool not ending

I'm just starting to use the knife tool and, after I finish using the knike tool, I can't seem to get it off of the knife tool. How do I get it off of the knife tool?
3 votes
1 answer
2k views

Shortcut for changing constraint angle of the Knife tool?

In Blender 2.93 I could enable the Knife tool's angle constraint by pressing C shortcut. By default, it was snapping to 45°. In Blender 3.0 default angle constraint changed to 30°. I know that I can ...
81 votes
5 answers
243k views

How would you cut a shape out of an object using another object?

Coming from SketchUp one of the tools I miss most is the circle draw tool which lets you draw a circle on any face and then you could extrude it in/out. The only tool that I know of that comes close ...
0 votes
1 answer
44 views

Problems with the knife tool/vertices when rendering with cycles

Hello! I've had this problem with the knife tool for 4 consecutive models, each time I encountered it I looked online and couldn't seem to find anything to help since I'm pretty much new to blender ...
0 votes
0 answers
146 views

Knife tool won't go away

I'm pretty new to blender but I've nearly got the hang of it. Unfortunately, I keep running into the same problem: whenever I use the knife tool, it won't go away! No shortcuts are working and I can't ...
0 votes
0 answers
21 views

Draw some Groove on Object [duplicate]

I'm designing a Sause Bottle In blender Lately. But I just Faced a Roadblock. As you can see in Reference Photos Below, there is some Grooves on The Top of The Bottle And I just Cant Pull it off! I ...
0 votes
0 answers
160 views

Knife Project outlines shape but does not actually cut

I'm trying to use Knife Project to cut a shape in a cylinder. For now I'm testing on the cube. I've used this answer as a guide. I added the mesh cube, then added a curve circle. I grabbed the circle ...
2 votes
1 answer
71 views

blender knife tool artifacts

so im working on a scroll and wanted to a add paper cut to the scroll, i did it by using the knife however when i turn back the subdiviosn modifier (i also have the solidify modifier) back the cut ...
0 votes
0 answers
100 views

Intersect faces between 2 objects without join or boolean modifier?

I'm kind of lost in my research, in a scene I'm trying to modify an object that intersects another object. Let me explain, so I go with the example I've seen many times with 2 cubes among each other. ...

1
2 3 4 5